Wax-thread sewing-machine.



V T. H. SEELY.

WAX THREAD SEWING MACHINE.

APPLICATION FILED mm. I8. 1915.

1,216,736. r latnted Feb. 20,1917.

3 SHEETS-SHEET l.

7/2Z7Z666 I 1x26722 07" T. H. SEELY.

WAX THREAD SEWING MACHIN 5.

APPLICATION FILED MAR. 1a. 1915.

Patented Feb. 20, 1917.

3 SHEETS-SHEET 2.

WfZZVZJJ 17206732 07 V T. H. SEELY.

WAX THREAD SEWING MACHINI.

APPLICATION FILED MAR. L8. [915 Patented Feb.20,1917. 3 SHEETS-SHEET 3.

WZZJZGJJ declare the followinfg receptacle is usually located at a pint re'lai- FATE] 'rnouas n seen, or a'annmv, massacnosn'rrs, A!lSIG-lNOihIQ FNI'I'ED SHQQIL L menmm; 'QOMPANX, 0F PATERSON, NEW JERSM a. 4 peera e-Immense To all w lw'in concern a; citizen of the United States, residing: at

Malden, in .thecounty of Middlesex and State of Massachusetts, haveinvented certain new and useful Improvements in Wax- Threa-d Sewing-Machines; and. I:- do hereby to be'aifull, clear, and exact description 0 the invention, such as will enable others skilled in theart to which it.appertains;to make and use the same.

' This invention relates to curved hook needle 'wax thread sewing machines and,

more particularly, to heating devices for such machines; I v: 'In sewing machines employing a Waxed thread -the needle threa'd between the thread supply and the .Work isusually passed I through alreceptacle containing melted waxto vimpregnate the thread with wax "before it is incorporated-in the seam. The Wax tively remote fromthe-work an 5 in order' to keep the' Waxed thread in a proper con dition until it reaches the Work, machines of this class are ordinarilyprovided with .a system: of heating "devicesarranged to" heat up the arts of the machine adj acent'to and engageby the thread as it passes from the wax receptacle to the'work. In curved hook needle Wax thread machines the thread is laid in the hook of the needle" by a loop ing device or looper which has a compound motion to'carry'thethread about theneedle and it is desirable that the looping device a should be heated 'to prevent the chilling of the thread as it passes. from the take-up through the eye of the l'oopingdevice on its 'way to the work. It has heretofore been a 'diflicult matter in wax, thread machines: 'of this class to keep the looping device iii a properly heated condition on account of the manner in which this device is mounted and operated.

The primary object of the resent inveri;

tiongis to provide curved hoo needle, Wax

thread sewing machines with an improved looper "heating device which willact efficiently and reliably to keep the looper in a grcgaerly'heated condition. I 1;.

i erent heating mediums are employed in difierent factories and under dilferent coni Specification}! Letters liatent K Structions, ariankg ements andacornbinations side elevation an a" detail comprises a c1 rvegl .hfoo

t t d ee ,91

ditions to heat-the parts bf waxtthread' sewing machines md it" isanother obj ect of the present invent ion to; produce e" curved hook needle;- .wax= t] ire'adi sewing machinehalving improved'mea ns forlhe'mting.thenloopenucon structed for :1 lse withzany one offltwo -or more heating medinnisyw liich i may be employed to heal the'machineg 3 With these objectsin view, the invention consists in certain novel aml'improved' conof parts 'h'erei a if fdescribed andfparticw larly 'pointed out iii-the claims," the advan.- (ages of Which-Will be skilled in the art. The -featuri of" readily jiifj deri to'o'd from drawings 'illust the invention following-5d Intlie d'ra 1 to those chine embed View particularly t1. heating 'devi' c is the'iriahine iifi d a v. system; FigfE is a 6W iI I"fI' lit elevation of the meclninisin illusitiated 4; is a detail sectional ievytak suh stiihtanyo t efl L detail' viewf iii 's'ide" particularly t .e'flo t ng Id vh. V I mach'ne is fi'tt 2d was an:

Fig. The invent ings is embod' hook needle ng, seamsot bout i or feed-point 4 in loop r of which parts have substantially; thesame; s e n; a :ran m ha d mod rator-1 eration as the corresponding vparts [of the No. 1,108,560 -d ated August-25", 1914, except that the loops] vlever is: somewhat-.mndified in construction The :welt cutting and .hol d.-

. i I machine illnstr Ltedlll the. patentftoflppler,

ing mechanism of the machine illustrated, indicated generally by the reference nu-. mend-1+, has substantially the same construction, arrangement and mode of opera.-

tionpas the mechanism 1llr|strated"1n the arm or lever 18, which is pivoted upon a short shaft 20 fixed inthe arms ofablock 22 semi-l ed to the forward end of the"'1o0p'er slide 24. 'Forward and rearward movements in a plane parallel with the plane of the needle are imparted to the looper by the reciprocation of the slide 24 and movements are imparted-to thelooper in a plane perpendicular to the lane of theneedleby the oscillation of the 20,- these movements occurring in proper timed relation to each-other to carry the looper .about the needle. The slide --24 is provided with a. cam roll 26 which engages a cam groove in a cam disk-attached tothe main shaft 30 of the machine. The looper lever is provided with an-arm '32 which. ex-

- tends laterally from the body of the looper lever beneath.. the forward end of the slide 2+,a'nd then extends upwardl in a'c'urve about the forward .end'ofthe s ideas shown in Figs. 4 and. 6

he upper end of this arm havingabearing in l -.hisi gri'od' carri;

mounted 'dii 'the'forward'end of the cam actuatedrock shaft 42. By this mechanism the looper lever is oscillatedon the shaft 20 1 slide 24 to be applied tothe hu in'.timed relationto the movements ofgthe give the proper movements to the looper.

. he illustrated construction of the looper heat t he,.lever eflicientlyn. The hub ofthe lever or-the portion thereof. through which .the. shaft 20 passes,'. indicatedat 44, is constructcd .with a cylindrical upper surface 46' Proj ng 'amsr which ;m ay fbe "employed. These looper transmit? lieat to the looperlever:

M to form a bearing for the looper heater.

conductiong, the loo er heater itself being heate by the applicationof the heating me- To enablethe looper to. be *.'with equal e'lficiency when',either' of eat the "machine, the machine is. provided with interchangeable looper heaters,

eaelrespecially" constructed for, the use of a" particular one of the heating mediums heatersare constructed, to be fitted alternatively to the machine at the same point on alined ooper lever on the shaft.

hich slides the rod 34".l sle We 36 which forms a lever enables the loogerfheating devices 'to. o the lever so as to.

ilferentheating mediums is employed 1 the machine and to operate in the same manner to transmit heat to the looper lever. In the present embodiment of the invention two interchangeable looper heaters are provided; one constructed for the use of electricity as a heating medium and the other for the use, of steam. When the machine is fitted with a steam heating system, the looper heater 48, shown in detail in Figs. 2, '3 andl, is emloyed. When the machine is to be heated y electricity the looper heater 50, shown in detail in Fig. 6 is applied to'the machine.

The forwardly projecting .fram'e plate 4 6 is formed with parallel guides 52 and 54 to receive either of the looper heaters. Thelooper. heaters 48 and are each formed wit a guide-engaging face 56. and with guide-engaging. faces 58 and 60 formed respectively on the projections 62 and 64, the faces58 and 60 being spaced from the face 56 so that the heaters maybe interchangeably fitted between the'guides 52 and 54 as shown respectively in Figs. 2

3 and 4.and in Figs. 5

applied to the frame of the machine, the

lower end of the heater; is engaged with the heat to the lever through conduction. To give an extended area of contact between the looper and the-hub of the looper lever,

and 6. When thus.

'hub of the looper lever so as to transmit each of the heaters is formed witha concaved cylindrical surface 66 having siibstantially the-same radius of curvature as the cylindrical surface-. 46 so that it will fit closely. at all points to the cylindrical sur- .face 46 formed on the hub of'the looper lever. In order to 'Inaintain agood heat conducting1 contact between the heating device and the slide 24 and-oscillates on the shaft 20,

means is provided for yieldingly"engaging the looper Iieaterwith the hnb "of'the lever. In the; construction illustrated each. of the looper heaters is provided-with acylindrical bore or pocket 68. and when the heater is ap-' seated in this pocket and a pin 72 is-eng-a'ged fin theupper end of the bore to forman abutment for the upper end: of the spring, this pin being for ed on a block 74 secured by a screw 76 to th frame plate 46. heaters-are each adapted to be gagement of the projection 78 thereon. be-

a considera e area is maintained between the :looper I heater and the looper lever throughou't' thcmovements 'of the lever so as to. transmit'the heat from the heater to a the looper lever rapidly and efficiently, the 130 The looper-- ,heldin position when-fitted to the machine by the eni 120 e hub of the looper lever as the lever moves forwardly and rearwardly with i plied to the machine a coiled spring 70 is looper itself being kept at a high teniperature by the conduction of the heat through the looper lever. This construction and arrangement of the looper heater also enables the steam chamber 82 is connected with the forward end of a steam supply pipe 84 leading from a steam chamber 86 formed in the frame of the machine. TheLexhaust steam from the steam chamber 82 is conducted from the chamber through an exhaust pipe 88 connected at its forward" end with said chamber and leading therefrom toward the rear of the machine. T

The looper heater is formed with a cylindrical chamber 90 to receive an electrical heating unit 92 which is inserted in said chamber and held thereinby means of a screw f 9.4, the head of which overlaps the end of the chamber. Theelectricalheating unit 92v consists of aseries of heating coils embedded in insulating material and having terminals 96 which may be connected in any suitable manner withthe main 'circuit terminals. It has been'considered unnecessary in this application. to illustrate the com-- plete electrical heating system for the machine. In the construction illustrated in Fig. 5 the terminals of the heating unit 92 are connected at the junction plate .98 with the secondary .circuit wires 100 leading from the front of the machine through an insulating shield or cable 102 to the terminals in asuitable junction box. The forward end of the shield 102 is held in lace upon the frame plate 46 by means oi a clamp 104.

Having explained the nature and object of the invention and having specifically de scribed'a machine embodying the invention in its preferred form, what is claimed isf 1. A wax thread'sewing machine, having, 'in combination, stitch-forming devices in cluding a curved hook needle, alooper, looper-"supporting and actuating mechanism comprising a series of moving parts and a fixed'looper heater..mounted in' guides and having a continuous yielding heat conducting contact with one of the moving parts.

2. A Wax thread sewing machine, having, in combination, stitch-forming devices including a curved hook needle, 0. looper, a looper actuatingslide, devices for supporting the looper mounted on the slide to reciprocate therewith, comprising a pivoted looper lever and a looper heater mounted in guides and having a continuous yielding heat conducting contact withpne of said looper supporting devices.

-3. A-wax thread sewing machine having,

in combination, stitch forming devices, ineluding a cum ed hook needle and a looper, a looper carrier, a looper heater having a heat conducting contact'wit'h the looper carrier and a spring to maintain ,;t,he heater in close contact v ith the looper carrier.

4. A wa'x ti read sewing machine'having. in combination, stitch' forming devices, including a cum ed hook needle anda looper, a looper lever a looper heater arranged to bear upon the hub of the looper lever and a spring to, maintain the heater in close contact with the hub of the looper lever.

5. A wax ti readsewing machine having,

in ,combinatioi l, stitch forming devices, in-

eluding a 01in ed hook needle and a 100 er,

a looper lever having a cylindrical sur ace formed on its cub, a looper heater mounted, in guides on t 1e frame and having a cylindrical surface arranged to engage the cylindrical surface )n the hub of thelooper lever and a spring for. maintaining the heating device in cont: ct with the hub of the looper lever. k 6. A wax;th read sewing machlne havlng,

in combination, stitch forming devices, including a curved hook..needle and a looper, and interchangeable looper heaters constructed for ihe use of different heating mediums adap t'edto be fittedalternatively at the same point on the machine.

7. A wax thread sewing machine having, in combinatior, stitch forming devices, in: cluding a curved hook needle and a looper and a series (1 looper heaters constructe for the use ofdifl'erent heating mediums and l formed to fit alternatively at the same point of the machire which is complemental to allof the loop :r heaters.

8. A wax th read sewing machine having,

in combinatiom'stitch forming devices, in-

cluding a curved hook needle and alooper,

a looper lever, a series 'of interchangeable 100 er heaters constructed for the use of di erent' heating mediums and formed to fit alternatively a; substantially the same point of the machine which is eomplemental to all 'of the.looper h eaters and means for securing said heaters alternatively in position.

9. A wax thread sewing machine having, in 'combinatior, stitch forming devices, including a curv ed hook-needle and alooper,"

looper lever pi" otally mounted upon the forward end of ti e slide'to oscillate in a plane perpendicular to the plane of the needle,

means for reciprocating the slide to move and means for maintaining a yielding en-- the free end of the loop-er nc-mss the path gagement between the looper heating device of the needle, means for oscilhltmg the lever and the looper lever.

to move the free end of the lnoper across THOMAS H. SEELY. 5 he plane 01. the needle, a looper heatmg devltnessesz we mounted In gmdes on the frame and ar- CHESTER E. ROGERS,

x ngred .to engage the hub of the looper 1e v01- E. MARION BLACK. 

